<?xml version="1.0"?>
<!-- XBRL 2.1 Tests -->
<!-- Copyright 2003 XBRL International Inc.  See www.xbrl.org/legal.  All Rights Reserved. -->
<schema targetNamespace="http://xbrl.example.com/397/XYZ"
  xmlns:xyz="http://xbrl.example.com/397/XYZ"
  xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:xbrli="http://www.xbrl.org/2003/instance"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink" 
  elementFormDefault="qualified">

	<import namespace="http://www.xbrl.org/2003/instance" 
          schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>

  <!-- summation concept -->
	<element  name="X" 
            id="X"
            type="xbrli:monetaryItemType"
            substitutionGroup="xbrli:item" 
            nillable="true"
            xbrli:periodType="instant"/>

  <!-- contributing concept for X ( X = Y + A ) -->
	<element  name="Y" 
            id="Y"
            type="xbrli:monetaryItemType"
            substitutionGroup="xbrli:item" 
            nillable="true"
            xbrli:periodType="instant"/>

  <!-- Z alias for A -->
	<element  name="Z" 
            id="Z"
            type="xbrli:monetaryItemType"
            substitutionGroup="xbrli:item" 
            nillable="true"
            xbrli:periodType="instant"/>


</schema>
